Gaudreault played with the Boston Bruins in the 1944-45 season. He got the chance due to Bruins' roster depletion thanks to World War II. Gaudreault did well, scoring 15 goals and 24 points in 44 games. He added two assists in 7 playoff games.
Gaudreault was better known as a star with the Quebec Aces in the Quebec senior league for six seasons. He also had six strong seasons in the AHL with the Hershey Bears.
He later lived in Alma, Quebec, managing the local rink and playing for and coaching the senior Eagles team all the way to the Allan Cup tournament in 1948. He returned to his native Quebec City in 1949. He continued to play with the Aces until the mid 1950s.